Lumber-joining machine.



PATENTBD AUG. 7, 1906 A. T. LINDBRMAN.

ALUMBER JOINING MACHINE.

APPLIATION` FILED JAN.17. 1905.

11 SHEETS-SHEET 1.

PATNTEDAUvJQoe. A.T.LINDERMAN. l

LUMBER JOINING MACHINE.

APPLIOATION'PILBD 14u17, 1905.

11 SHEEvTSvj-SHEBT 2.

No. 827,738. PATENTE-111111.?, 1906. A. 11.111111151111111.

LUMBBR JOINING MACHINE.

APPLICATION FILED 11111.17, 1905.

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PATENTED AUG. 7, 1906.

A. 'I'. LINDERMAN. LUMBER JOINING MACHINE.

APPLICATION FILED IAN. 17. 1905.

No. 827,738. PATBNTED Ancha, 1906..

A. T. LINDERMAN. LUMBER JOINING MACHINE.

APPLIGATION FILED JA'N. 17, 1905.

11 SHEETS-SHEET 6.

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NO- 827,738. PATBNTED AUG. 7, 1906. A. T. LINDERMAN.

LUMBER JOINING MACHINE.

APPLICATION FILED JAN. 17, 1905.

11 SHEETS-SHEET 7.

No.. 827,738. V PATENTBD AUG. 7, 190e. A. T. LINDERMAN. LUMBBR JoINING IWAGHIKXE.i

APPLICATION FILED JAN. 17, 1905.

11 SHEETS-sums.

v fraai/6- NO- 827,738. PATENTBD AUG. 7, 1906. A. T. LINDERMAN. LUMBER JOINING MACHINE.

APPLICATION FILED 519.11.17, 1905.

11 SHEETS-SHEET 9.

.beffl Inder/flaw PATENTED AUG. 7

A. T. LINDERMAN. LUMBER JOINING MAGHINE.

APPLICATION FILED JAN. 17, 1905.

'V 11 SHEETS-SHEET 10.

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No. 827,738. PATENTED AUG. 7. 1906. A. T. LINDA-AMAN.

LUMBER JOINING MACHINE. APPLICATION FILED JAN.17. 1905.

11 SHEETS-SHEET ll.

ly m5' zza 'imi-rans'rarns PATENT IPIQE.. a

ALBERT r. LiNDERMAnoF wHirnHLL, MicHiGAN..

LUMBEnF-uouNlNc-i mam-HNE..

*1 Specication of Letters latent Patented aug. 7, ieee Application flied January 1'1,19o5. serial No. 241,499.

To all whom, it may concern:

Be it known that I, ALBERT T. LINDER- MANI, a citizen of the United States, residing in Whitehall, in the county of Muskegon and State of Michigan, have invented a new and useful Improvement in Lumber-Joining Machines, of which the following is a specification.

In Patent No. 661,542, granted to me on the 13th day of November, 1900, I show a machine embodying two sets of cutters for forming interfitting dovetails on the surfaces of two pieces of lumber and means for bringing said pieces together endwise with the dovetails in alinement, so that the do'vetails may then be forced into engagement. The means for feeding the lumber past the cutters and into engagement with each other consisted of two endlesscarriers which are alike in their construction, but which move in opposite directions in` adjacent planes, some portion ofeach carrier overlapping or being extended abreast of a portion. of the other carrier. The links of the carriersin the irst machines built under the patent were made quite long#some twenty --four inchesand each link was'A provided with a pushing-dog for pushing the lumber along, such dogs being normally kept raised in acting positionby springs and being further adapted to recede below thesurface of the links whenever the lumber was so placed as to bear downward upon them. In machines of this character it is desirable that the inter vals or open spaces upon the carriers b'etween successive pieces of stock shall be as short as possible in order that the procession of the pieces to be joined shall be practically continuous and no time be lost unnecessarily between the cutting operations or the joining operations. It is also desirable that the intervals referred to be of uniform length, so that in cases where the stock is placed upon the carrier by hand the operator will be less' apt to make mistakes thanhe would be if the intervals varied. The patented construction did not accomplish these results as perfectly as I desired, and hence I have been led to make the present invention, in which instead of making the links long I now lmake them quite short-some eight inchesand increase theirnumber accordingly,A and instead of the normally raised dogs of the patwhereby such of the dogs as are required. to

operate, and such only, may be raised at the proper times to engage and feed the stock.

The selecting means may raise all .the dogs orevery second or third or fourthdog, leaving the intervening ones depressed and inactive,

on different lengths of lumber by merely changing thev se ecting. means, no change whatever being required inthe carriers.

Another object which I have in view inthe present invention is the providing of means for withdrawing the dogs from action at the instant when they have brought the ends of the two pieces of lumber to the same trans- .Verse plane, or, in other words, when the said or abreast of one another, so that in the subse uent working up o f the united board there wi be no waste at the ends.

The invention also embraces means for automatically releasing the presser-rollers in vthe center of the machine when the boards .ends of the twopieces are eXactlyeven with have been joined, as stated, with their ends i even with one another, also means for rendering such rollers active or inactive, according to the length of the stock or number being worked, also improved means for the Ieasy and accurate maintenance of the proper relations between thef cutters and the stock and the lubrication ofthe arbors carrying the cutters, also improved means for automatic-r ally ejecting the finished stock from the machine, also means for causing the release of fthe finished stock from the machine in case .of accident also means for regulating the feeding of the stock relative to its straight or crooked edges, also an improved construction vof the means for applying the glue to the stock, also means-for adjusting the cutters acting u on the same piece of lumber bothv indepen ently and unitedly, also an. im-

proved construction of the cutters and means for lautomatically stopping the carriers in gas? eine of the pieces of lumber should fail to In the accompanying drawings, forming a ICC IIO

part hereof, Figure 1 is a side elevation of the machine such as l have manufactured for the uniting of stuff three feet long, this being one of the smaller and more compact machines and the drawing being upon a small scale in order that it may all be shown in the single figure. Figs. 2 and 3 are enlarged elevations of the opposite sides of one of the larger machines. Fig. 4 is a plan of the portiony of the machine shown in Fig. 3. Fig. 5 is a detail of a portion of the presser-roller mechanism. Fig. 6 is a partial longitudinal section of said mechanism. Figs. 7, 8, and 9 are detail sectional views of the presser-rollers, and Fig. 10 is a detached view of a portion of the mechanism. Fig. 11 is a partial horizontal section. Figs. 12 and 13 are sections on the v lines 12 12 and 13 13, respectively, of Fig. 3.

` of Fig. 1.

bearingof one of the cutters.

v with the glueot in section.

Fig. 14 is a partial elevation of one of the carriers and its supporting-ways, partly broken away. Fig. 15 is a transverse vertical section showing both carriers. Fig. 16 is a detail plan of the trip mechanism. Fig. 1|7 is a section on the line 17 17 of Fig. 18. Fig. 18 is a transverse vertical section on the broken line 18 18 of Fig. 3. Fig. 19 is a partial longitudinal elevation of one of the carriers, partly in section, and one of its supportingwheels. Figs. 20 and 21 are sections on the lines 20 2O and 21 21, respectively, of Fig. 1.9. Fig. 22 is a partial elevation of one of the carriers, showing its connection to the machine. Fig-23 is a plan view of the same. Fig. 24 is a section on the line 24 24 of Fig. 22. 25 shows one of the forms of star-wheels employed for setting the dogs. Fig. 26 is a transverse vertical section on the line 26 26 Fig. 27 is a detail of the lower Fig. 28 is a vertical section of one of the cutter-arbors and its support. Fig. 29 is an enlarged detail of the upper bearing of the arbor. Figs. 30, 31,v and 32 are sections upon the lines 3() 30, 31 31 and 32 32, respectively, of Fig. 28; Fig. 33 isa vertical section ofthe glue-applying mechanism. Fig. 34 is a side elevation Fig. 35 is an enlarged detai of the glue-.applying wheel or roller. Fig. 36 is an enlarged detail vertical section of the two cutters acting on the same' board, one being shown in dotted lines.

In said drawings, 40 and 41 representtwo frames, each supporting one of the carriers and arranged in parallel adjacent planes with their proximate ends overlapping, so that the carriers may be enabled to carry the lumber one piece upon each into engagement. These carriers are endless and composed of carriages or sections 42, prefcrabl about eight inches in length, linkedtogether and driven by four-sided wheels 43 at the inner ends of the supporting-frames and passing over similar non-driving wheels 4 4 at the outer ends of the frames. Between the wheels the upper course of the carriers is sup- Fig.

. adapted to engage with camas ported by and'slides alon stationary ways 45, each of which is provided with two it shaped longitudinal ribs or guides fitting grooves formed'in the under surface of the carriages, Figs. 13 and 18,while the lower course passes over idlers,'as shown at Fig. 3. One of the driving-wheels 43 is actuated from the drive-pulley 24() of the machine by the' pinion 47, gear 48, shaft 49, gears 50 and 51, and shaft 52, supporting said wheel 43, and power is carried from shaft 49 to the other wheel 43 by bevel-pinion 53 on shaft 49, pinion 54, meshing with pinion 53, longitudinal shaft 55, carrying pinion 54, bevelpinion 56, also on said shaft, bevel-pinion 57 meshing with pinion 56 on crossshaft 58, and gears not shown, but correspondin to gears 50y and 51 for carrying power from s aft 58 to the shaft" of said wheel 43. These carriers are adapted to carry the stock past the cutters by which the dovetails are cut in it, but also by their continued movement to unite the dovetailed pieces. They are arranged in parallel adjacent planes, with their inner ends extended beyond or abreast of each other, 'and to adapt them to thus feed the stock each carriage in them is provided with its own individual pushing-dog 60, the construction whereof and of their positioning and selecting devices is best shown at Figs.- 19 to 25.

The dogs are pivoted on cross-pivots 61, and each is provided with the following features, viz: a projection 62, serving to engage and push the stock, a recess 63 below the pusher 62, adapted to receive a swinging locking device 64, and a cam-surface 65, adapted to swing the dog on its pivot 61, and thereby position it in its acting position. The selecting of the dog to be raised is accomplished as follows: Adjacent to each wheel 44 is a wheel 66, which l ca ll a starwheel and by which the selecting is done. It is provided with such number of arms 67 an'd 68 as desired, the arms 67 being pointed and the arms 68 being provided with broad outer ends, at one side of which are projecting points 69. These arms 67 and 68 are all ins 72, projecting laterally from the whee 44 as the latter moves past the star-wheel, and this engagement causes the turning of the star-wheel a regulated distance at each actuation, so that each of the arms positions the star-Wheel/for engagement with the next succeeding arm .i oo

' surface 65 pf the do estates 'end of the arc-slots 7 in the-web of wheel 4t,

arc-slots to the other, their outer ends, which bear upon the camwhich is then positioned infoperative're ation to the lifter and force the dog from its non-acting position shown in the case of the lower dog in Fig. 19 to its acting position shown in the case of the upper one in full lines in the same 'ligure The lifter is retracted by its spring as soon as its pin has freed itself from the point 69 of the arm 68 of the star-wheel, and the starwheel is positioned by the said pin as it passes point 69 in readiness to engage the pin next in order. into acting position, the locking devices 64, with one `of which each is provided, are, carriedfrom the inclined position shown in the case of the lower dog to the vertical or radial position shown inthe case of the upper dog, so that its outer end sets directly under the pusher 62 and sustains any downward pressure coming on the'pusher fromv the stoclr. The locking devices swing on their pivots 77 and are controlled in the change described by the dogs' and when thus `positioned are retained by springs 78, one end of which is secured on the pivots 6l ofthe dogs and has its other end secured on pivots 79, by which the are beveled, as shown,

connecting-links 8l) of the carriers are se-- cured to the carriages. These springs are angular and bear at their centers upon the locking devices, and the. upper ends of the lor-king devices are offset to give ita bearing, as seen at 81..l `igs. i9 and 21. The locking devices ma also be provided lwith rollers82 at their endls to facilitate their movements.

The dog raised into acting position bythe means described is now in readiness to push a piece of the stock past the cutters and into engagement with a like iece presented by the other carrier. Simu taneously with the completion of the joining operation the dog is withdrawn from action and'receded into its carriage, asy now to be described. Below the carriers are racks 82 andv 86, sorpositioned in the bottom of the carrier-ways that their ends encounter such of the locking devices 64 l of the carriers as ma be in their acting position when the locliing devices reach the proper -point in their travel for the withdrawal of the kpushing force from the stock. When thus tripped, the locking devices are forced back into their inclined positions and their roller ends enter the recesses in the dogs When the dogs are thus movedV and assisted by the springs 78 they force the dogs finward, so that the pushers are taken out off their sphere of action and the feed of the lumber ceases. The rack 82 is adjustable longitudinally, so -that it may operate sooner or later, asthe length of the stock requires, the adjustments being effected by the gear 83, shaft 84, and handwheel 85. adjustments are made whenever a change occurs in the'length of the stock, the rack being stationary when in operation.

Both carriers have the same normally depressed dogs, the same selecting devices, the same locking devices 64, and the same lifters 5 but the other tripping-rack (shown at 86) is movable instead of stationary and is controlled as to the time it operates by the stock upon the carrier controlled by rack 82 for reasons which will appear in the next paragrsph.

n the use of the patented machine it was found that the ends of the stock when joined were not always even with each other, and consequently some trimming of one or the other ofthe united boards was necessary to make them even. To avoid this, l have devised means whereby the stock itself upon one 'carrier is made to control the tripping of the dogs of the other or second carrier. These means are the following: At one side of the machine is a longitudinally-movable rack-bar 90, having its rack-teeth formed on its under surface and meshing with a gear 91 on a cross-shaft 92, carrying a second gear 93, meshing with the above-mentioned rack 86 of the second carrier. The rack-bars 86 and are thus compelled to move in unison. Attached to one end of rack-bar 90 is an arm 94, which. I lcall the feeler, extending over the first carrier, whose tripping rack-bar 82 is stationary, and into position Where it will be caught by the stock on said carrier and carried along 4with it during the latter portion of the stocks travel and until the dog pushing that stock is tripped by rack 82. As soon as the pushing force is thus removed the stock stops moving,and consequently the rack-bar 90 also stops, thereby stopping the rack-bar 86 and causing it to trip'the dog of the second carrier which was feeding the other piece, of the stock. l. vfind it desirable that the dogs of one carrier should be tripped slightly in advance of those of the other; lbut when properly adjusted there is no diiiiculty in uniting the lumber with the advance end of each piece exactly even with the rear end of the other, so that no trimming of that end The IOO

IIO

of the composite board will be necessaryif scribed lateron. A hand-wheel J6 is also ISO provided on the shaft 92, whereby the rackbars 90 and 86 `may be adjusted. As the.'

construction of the pressers is best shown at Figs. to 9. Each of the releasable pressers embodies a roller 100, bearing upon the stock, and y a swinging frame 101, supporting the roller and itself pivoted on a pivot 102, the

" ends of which are let into plates 103 at each side of the frame,-each pair of the plates 103 serving all the pressers of one of the carriers. rlhe frames 101 of the carriers are normally inclined, those of one carrier in one direction and those of the other carrier in the opposite direction7 and a spring 104 extends from the upper end of each to a pin 105, let into a lever 106, located over an adjacent frame and pivoted at 107 to one of the side plates, 103, as particularly shown at Figs. 6 and 7 The tension .of the springs 104 tends to force the rollers down upon the stock. The levers 106, except those at the ends, are slotted at their upper ends, and through the slots project bolts 108, secured in a horizontal bar 09. There are two of these bars, one` for the pr ssers of each carrier, and through them the rollers are raisedv from the stock, automatic longitudinal movements being given them for this purpose, as hereinafter described, whereby the levers 106 are reversed from their normal positions, thereby relieving the tension cf the springs 104, so that the rollers if not actually. raised do not press the stock objectionabl or interfere with the ejection of the unite board. Pressers are also provided over each carrier with which to hold the stock down while the dovetails are being cut in it. These pressers are located over the outer ends of the carriers, as shown'at Fi s. 1 and 3, and their construction is shown at igs. 6 andS. They .each embody. rollers 100, similar to those of the releas'able pressers, and/frames 110, supporting the rollers. The frames 110 are ivoted on pivots 111, supported in the p ates 103, and are extended above the pivots, where they carry heads 112, through which project studs 113, integral with collars 114, mounted on the pivots 111 of the next adjacent pressers. The frames 110 are inclined in one direction and the studs in the opposite direction, as plainly seen at Fig. 6, and s rings 115 encircle the studs below the hea s and exert such pressure as tends to hold the pressers down on the stock. @ther but lighter springs 1 16 are esmas mounted on thestuds above the heads to cushion the movement occurring when the 'rollers drop off the stock. All the rollers 100 I ceives from theistock, this larm encounters a stop 121,v adjustably secured to a rod 122, ar-` ranged at the side of the bar and mounted upon the ends of two horizontally-extending cranks 123 and 124. 0f these cranks the one marked 124 is mounted on and actuates a vertical shaft 125, the lower end of which carries an arm 126, connected by a link 1261L to crank-arm 127 on a horizontal shaft 128. Upon shaft 128 is an upwardly-extending arm 129, the construction of which appears in Figs. 17 Vand 18 and whose main purpose' is to normally hold the sliding part 130 of a clutch from engaging with the non-sliding part 131. The arm 129 is enabled to do this by4 its contact with a lwedge-shaped segmentalvcam 132, mounted on the part 130. rlhe clutch composed of the parts 130 and 131 is mounted on the main drive-shaft 46, which turns only when actuated by it, the part 130 being keyed to the shaft and the part 131 being loose. 'v The spring 133 presses the sliding member into engagement with the non-sliding one and closes the' clutch when-4 ever allowed to do so by the arm 129. The nonssliding clutch member also carries a gear 134, which is in constant motion by reason of its meshing with gear 135 on shaft 49.

Slo

ICO

Vith this construction it will be seen that the rack-bar 9() will carry rod 122 along with it until the cranks 123 and 124 have. defiected the rod far enough to let the stop -121 escape from the arm 12-0. ln the movement thus given to the rod the shaft 125 will have bee'n turned so as to rock shaft 128, thereby carrying arm 129 away from its acting position and allowing theclosing of the clutch, with the result that movement is imparted to the shaft 46. This movement of the main shaft is limited-to a singlerevolution, however, be-

cause the arm 129 is provided with a return-v ing-weight 136, which as soon as the stop 121 has cleared the arm brings said arm and the rod 122 and all the intervening parts IIO Aback to their normal positions, so that the cam 1 32, which meanwhile is moving with the clutch, will when it reachesthe arm 129 enter its thin edge into the open space formed between its carrying clutch member and the .bevel edge 137 of' said arm and by its continued movement therein gradually push back the member and eect the opening of the clutch. The rotation of the clutch eamae E member 130 thus ceases before the cam has passed the' arm, and consequently'the latter retains control and holds said clutch member out of engagement 'th another actua, tion of the parts whereby the arm 129 is moved out of action. The clutch is shown as-closed in Fig. 18. f l

In the sin le revolution of the main shaft received as a ove set forth an eccentric 140, mounted on the main shaft, raises a vertical rod 141, supported upon the strap of the eccentric and having its -upper end bent at right angles and provided with a depending link 142 and connecting it to an arm 143, projecting from a sleeve 144, mounted upon a stationary shaft or pivot 145. This sleeve is provided with anadju ting-flange 146 at its end, which abuts agailjt a similar ang'e 147 upon a secondl sleeve 148, mounted on the same pivot and carrying two oppositely-projecting arms 149 and 150, one of which is connected by a rod 151 to the presser-controlling bar 109 of one carrier and the other of which is connected .by a rod 152 to the presser-controlling bar of the other carrier. The adjusting-flan es are bolted together by the bolt 153, an to permit the adjusting of one flange relative to the other the flan es are provided with crossed or X-shaped slots, as shown, which give the range of adjustment needed in timing the releasing of the bars. rThe mechanism described is adapted to rewerse the inclination of the roller-frames of both carriers by imparting longitudinal movements to the controlling-bars 109 through the arm 149 and 150, and thereby to relieve the united board from pressure, so that the kicker or ejector 160 may` act and throw it out of the machine. 0f course the pressers and their controlling-bars and the intervening parts return to normal position with the return of the eccentric toits starting position, so that the pressers are then in readiness to act upon the next pieces of stock. p y

lt is frequently desirable when working short stock to prevent the lifting of such of the central pressers as do not bear upon it at the time it is ready to be ejected, and to enable this to be done l provideupon one of the side plates of each series thereof a notched plate or bar 154. (Seen clearly at Figs. 5 and 7.) The pressers which are to be rendered inactive 'so-far as the lifting is concerned are detached from their controlling-bar 109, and their bolts 108 are inserted in the slots .of the bar 154 with the pressers reversed from their normal positions. Until they are again connected to bar 109 they are not releasable, but continue tovpress on the stock as it passes them.

The kicker (shown at 160) is secured at one I end to a vertical pivot 161, Fig. 2, and this pivot is confined in a suitable bearing and provided with an encircling spring 162, tl'e tension of which tends constantly to turn the pivot in the proper direction for ej ecting the united boards. The kicker bears against the edge of the stock. It normally lies across the path of the incomin stock upon the adjacent carrier, so that ti forces the kicker to the position of Fig. 11, and thereby tightens the spring and puts it into condition to operate as soon as the boards have been united and released from the ressers.' v f T e dovetail-cutters are shown at 170, a pair of them, inclined oppositely to each other, being employed to cut the dovetails on .each piece of stock. They are mounted on arbors 171, and the arbors are supported 1n frames 172, there being one of these frames for each pair, and eachframe is supported b and adjusted upon a screw 17 3 so that bot cutters operating upon the same stock can be given any vertical adjustment needed with#l out affecting their relation to each other in any way. That portion of the frames 172 which encircles the arbors is made in pipe form 174, partially cut away at one side and between its ends to admtthe-belt to the pulley 175. The arbor is arranged eccentrically in this pipe and provided with surroundin cylinders 176 at the top and 177 at the ottom, both cast in one piece with the main pipe 174. ln the top bearing 176 l insert a bushing 178, which isfitted to the arbor and conforms to e stock as it entersits taper, as plainly shown. r[he upper portion of this .bushing is threaded and engages threads on the inner surface of the bearing 176, and its upper end is provided with a notchedflange 17 9 ,whereby it maybe turned by a considerable wrench, and a locking device or clip 180 is 'inserted in one of the notches of the flange after the .bushing has been properly adjusted. This bushing is raised or lowered from time to time, as required, and in order that it may be lubricated I form an annular roove 181 in it, the vertical dimensions of wllich permit it to retain its registration with the feed-pipe 182 of the grease-cup 183. Openings 184, of which there is usually a plurality 1n the bushing, admit the lubricant to the arbor. The arbor ITC is preferably grooved vertically in both di.-

rections-from the annulargroove 181, such grooves forming feed-passages ada ted Ytov carry the lubricant tothe ends bf the caring. The lower bearing is also provided with a bushing 185,l which also conforms to the ta- ,the bushing of the upper bearing. At its lower end the arbor is lprovided with. a threaded point upon which is secured a nut 187, and surrounding this point and nut is a cap 188, its top extending over the nut, and in this cap is entered a threaded plug 189.

, into the bottom of the plug 189.

Between the top of the plug and the nut 137 is yinserted a wear-plate 190. The plug `is locked by a nut 191. The bottom of the cap is provided with laterally-extending wings 300, whereby it is bolted tothe bottom of cylinder 177. The nut 187 prevents end play of the arbor, and it is made thin in order that its thickness may be affected but little by the expansion due to heat in running and its action upon the arbor be practically uniform yand unchanged by the heat. The lubricant for this lower bearing comes from the greasecup 192 through the pipe 193, which is led Both, the plug and the wear-plate are provided with central openings or passages for the grease, and the top of the wear-plate is provided with horizontal grooves 194, by which the A lgrease is carried to the vertical passages 195 through the `nut 187 and from tthence finds its way into the passages 196, 197, and 198.

Not only is the frame 172 vertically adjustable, but the pipe 174 is longitudinally adjustable in the frame. It rests, as will be seen at Fig. "28, upon a centrally-located screw 199, and this screw may be moved up or down `and may be passed through the lower part of the frame and through the nuts 200 both above and below the frame. In this manner each item may be adjusted vertically independently of the other arbor.

A short adjustment I obtain by turning the pipe 174 in the frame. To effect and retain this adjustment, I provide on the outside pipe 174 a ring 201, which is split and has'one end turned down, as shown at 202. The ends of the ring may be bolted together by the bolt 204. Upon the surrounding part of the frame 172 I mount adjusting-screws 205 and. 206, both of which bear upon the turned-out end of the ring. The surrounding portion of the frame isalso split and adapted to be tightened upon the pipe 174 by thescrew 207. I/Vhenevcr the pipe needs to be turned on its axis or to be adjusted vertically by the screw 199, this screw 207 is loosened and then retightened after the adjustment has been4 effected. inasmuch as the arbor is located cccentrically of the pipe 174, it will be seen that by turning the pipe 174 the action of the cutter may be considerably modified.

The cutters themselves are so fashioned as to avoid the formation yin the stuff of the sharp angles heretofore customary at the inner corners or points of the grooves and at the corres onding parts of the tongues. I prefer to ma re these points or angles blunt instead of sharp and as articular-ly shown at Fig. 36, where the ang es referred to are indicated at 211. By this change in the cutters the joint itself is im roved while the parts re'main perfectl interi ting, and the neck of Athe tongue )y reason of the non-removal of much of the material heretofore cut out is strengthsharp angles.

santes ened; but most 'important of all is the fact that the changed cutters retain their sharpness and integrity much longer than when made in the old way, in which they cut the I also find it desirable to form the cutters so they will remove the sharp edges heretofore formed along the longitudinal edges of the groove, as shown at 212 in the same ligure, so that the intervening tongues at their tops will be shaped to correspond to the bottoms of the grooves. In other words, by this feature the hitherto sharp corners of the tongues, which are also the edges of the grooves, are renderedl blunt, so as to bring them into intertting correspondence with the blunt angles or points 211 of the grooves. As the art thus cut away is very apt to sliver or brea i off, I avoid thereby a fruitful source of trouble.

- Another feature of the invention relates to the application of the glue to the surface. After much experimenting I have devised a mechanism for applying the glue, which consists of a dished wheel 220, rotating upon an inclined axis 221 and having vnumerous openings 222 from its interior to its exterior.

It is placed so that its lower portion is con-` stantly in a vat of glue 223. The axis 221 is supported by an arm 224-, hinged to a projecting arm and pressed toward the work so as to carry the Wheel against the dovetail surface by a spring 226 and a set-screw 227. The gluing-wheel is covered with canvas 228, which may be sewed together across the center of its upper surface, and the body of the wheel is preferably made of cast metal.

It sometimes Ahappens that throu h improper feeding or other cause'the lum er be; comes lodged or caught in the machine. such times it is desirable to relieve' it from pressure to enable its removal, and to enable this to be done I provide a hand-lever 230, pivoted at'231 and extending under the eccentric lever, so that it is adapted to swing said lever without lifting it, and thereby to relieve the lumber of the pressure, and supplementing this, lever 230 is a second lever 231, pivoted at 232 and connected at each side of the pivot to the reversing-bars of the two series of pressers. This second lever is intended to be operated after the first lever, and its purpose is to restore the parts to their normal positions.

The pinion 47, thrbughwhich the carriers are driven, is loose upon shaft 46 and is connected vto the driveulley 240, also loose upon the shaft, by a c utch, (shown at 241 in Fig. 12,) the pulley being the sliding member of the clutch. It sometimes happens that onlyone of the two boards will be fed to the machine, and when this board ison the side where the ejector is located it is apt to be carried beyond the ejecting-point, if it isa long board, or if it is short it may be forced beyond the ejecting-point by the following IIO pivoted to an arm 244, projecting from a ver- I tical rock-shaft 245, and this rock-shaft carries an arm 246, engaging a pin 247 in a lever 24S, joined to a second lever 249, pivoted to a stationary bracket 250 and connected at its longitudinal center to the movable part of the clutch. Through this construction the swinging of the pivoted arm 242 b the lumber will cause the movable mem er of the clutch to shift, so that the power is withdrawn from the carriers. In order that they may be again started after the rem val of the displaced lumber, the lever 248 is extended, as shown at Fig. 12, so that it may be grasped' by the hand and moved in a direction which will close the clutch and restore the power.

The arm 12()l is pivoted at 320 and provided with a spring 321, so that when it moves back to normal position it may ride over the stop 121. A. stop or shoulder 322 limits the motion of the arm to this one direction. In cases where changes of afoot or more in the length of the stock occur the angle iron bar 323, Fig. 3, is slid one way or the other, according -asthe change is a reduction or increasein the length of the stock, a distance equaling the extent of the change. In these adjustments the bar 323 carrieswith it the rod 324, which is attached to it by means of a bracket 325, formed on the bar. This rod 324 passes through a lug 326, attached to the slide 90, and also thrirugh the spring 95, so 'that it is adapted to compress said spring. When vthese adjustments are made, the stop 21 is also adjusted on its supporting rod orfbar to a corresponding extent and in a corresponding direction.

The operation of the machine is as follows: Supposing the parts to be in motion, the carriers moving in opposite directions, and that two pieces of lumber are placed one upon each carrier simultaneously, the movement of the carriers carries the lumber first under the pressers 110, by which they are held down while undergoing operation by the dovetail-cutters, and the continued movement carries them after Vthey are cut into engagement with each other, the tongues of one being forced into the grooves ol' the other. The engaging movement is stopped when the ends are even with each other, the stock itself upon one carrier, through the mechanism described, controlling tlie tripping of the dogs of the carrier. While the stock is being united it is held down by the releasable pressers at ther-enter of the machine, and as soon asl the union is completed these pressers are raised and the stock is ejected by the kicker '160.

The operation of the different parts of the machine has been fully detailed in the description of the parts, and their operation therefore does not need to be recapitulated,

1. In a machine for joining lumber, oppositely-moving carriers the sections or carriages whereof are provided with normally depressed dogs for pushing the stock, in combination with automatic selecting mechanism for positioning the proper dogs for action.

2. In a machine for joining lumber, oppositely-moving carriers the sections or carriages whereof are provided with normally depressed dogs for pushing the stock, in combination with automatic selecting mechanism for positioning the proper dogs for action, and means for tripping the dogs automatically.

3. In a machine for joining lumber, a carrier for feeding the stock consisting of sections or carriages, each providedv with a normally depressed feeding-dog, and selecting mechanism for raising the proper dogs.

l 4. In a machine for joining lumber, a carrier for feeding the stock consisting of sections or carriages, each provided with a ncr-- mally depressed feeding-dog, selecting mechanism for raising the proper dogs and means for locking the dogs in the raised position.

5. In a machine for joining lumber, a carrier for feeding the stock consisting of sections or carriages, each provided with a normally depressed feeding-dog, selecting mechanism for raising the roper dogs, devices for locking the dogs in t e raised position, and means for tripping the locking devices, and thereby causing the withdrawal of the dogs.

6. In a machine for joining lumber, a carrier for feeding the stock consisting of sections or carriages, each provided with a norn mally depressed feeding-dog, and a device for selecting the dogs to be raised, consisting of a star-wheel and means whereby the wheel may cause the raising of the dogs.

7. In a machine for joining lumber, a carrier for feeding the stock consisting of sections or carriages, each provided with a normally depressed feedingfdog, a device for selecting the dogs to be raised, and means for raising the dogs set inaction by the selecting device.

4 S. In a machine for joining lumber, a carrier consisting of a series of carriages each having a normally depressed 'feeding-dog, wheels over which the carrier moves, a selecting device for selecting the dogs to be raised, and lifters carried by one of the wheels and acting to raise the selected dogs.

9. In a machine for joining lumber, a carrier consisting of a series of carriages each IOC IIO

having a normally depressed feeding-dog, wheels over which the carrier moves, a selecting device for selecting the dogs to be raised, lifters carried by one of the wheels and acting to raise the selected dogs, and locking devices for locking the dogs in the raised position.

10. The carrier for use in joining lumber, embodying a series of short carriages linked together, wheels for operating the carrier,1a series o-fdogs one in each carriage, a device with each dog for locking it when raised, selecting means for selecting the dogs to be raised, and lifting means for raising the selected dgs.

11. The carrier for use in joining lumber, embodying a series of short carriages linked together, Wheels for operating the carrier, a series of dogs one in each carriage, a device with each dog for locking it when raised, selecting means for selecting the dogs to be raised, and lifting means for raising the selected dogs, in combination with means for releasing said locking devices.

12. The combination in a lumber-joining machine of two oppositely-moving carriers, each embodying a series of short carriages linked together, wheels for operating the carrier, a series of pushing-dogs one in each carriage, a device with each dog for locking it when raised, selecting means for selecting the dogs to be raised and lifting means for raising the selected dogs.

13. The lumber-joining machine embodying two oppositely-moving .carriers for feeding the stock into engagement, both carriers having retractable feeding-dogs and means whereby one of the carriers controls the retraction of the dogs of the other carrier.

14. The lumber-joining machine embodying two oppositely-moving carriers for feeding the stock into engagement, both carriers having retractable feeding-dogs and means whereby one of the carriers controls the retraction of the dogs of the other carrier.

15. The lumber-joining machine embodying two oppositely-moving carriers for feed-- ing the stock into engagement, both carriers having retractable feeding-dogs, means for tripping the dogs, and means whereby one carrier controls the tripping means of the other carrier.

16. The lumber-joining machine embodying two oppositely-moving carriers for feeding the stock into engagement, both carriers having retractable feeding-dogs and means for tripping the same, the tripping means of one carrier being stationary while those of the other carrier are movable and are controlled from the first carrier. 17. The lumber-joining machine embodying two oppositely-moving carriers for feed- ,ing two pieces of stock into engagement, both having retractable feeding-dogs, and means for tripping the dogs of one carrier at a pre- 6 5 I the first carrier for tripping the dogs of the other carrier when the ends of the two pieces are even with each other.

19. The lumber-joining machine embodying two oppositely-moving carriers for feeding two pieces of stock into engagement, both having retractable feeding-dogs, and means for trippin the dogs of one carrier at a predetermine time, and means controlled by the' iirst carrier for causing the tripping of the dogs of the othercarrier when the. ends of the two pieces are even with each other.

20. The lumber-joining machine embodying two oppositely-moving carriers provided with dogs for feeding the stock, a sliding rack-bar 90, a feeler on said bar engaged by the stock on one of the carriers, means for tripping the dogs of both carriers, and gearing connecting the bar 90 to the tripping means of one of the carriers.

21. The lumber-joining machine embodying two oppositely-moving carriers for feeding the stock into engagement, both carriers having retractable feeding-dogs and the retraction of the dogs of one of them being controlled from the other carrier, pressure devices acting on the `stock while it is being` joined, and means controlled from one of the carriers for causing the release of the pressure devices.

22. The combination with the carriers of the pressers consisting of the rollers, the inclined pivoted roller-frames, the springs acting on the frames and the reversible levers for controlling the springs.

23. The combination with the carriers of the pressers consisting of the rollers, the inclined pivoted roller-frames, the springs acting on the frames, the reversible levers for controlling the springs, and the horizontal bar for reversing the levers.

24. The combination with the carriers of the pressers consisting of thc rollers, the inclined pivoted roller-frames, the springs acting on the frames, the reversible levers for controlling the springs, the horizontalbar for reversing the levcr, power devices for actuating said bar and means whereby one of the carriers controls said power devices.

25. The combination with the oppositelymoving carriersfof presscrs for holding the stock upon the carriers while it is being j oincd power devices for eil'ecting the release IOO of the press'ers, andmeans whereby the operation of said powerdevices may be controlled by the stock upon one of the carriers.

26. The combination with oppositely-moving carriers, off a series of pressers over each carrier bearing upon the stock while it is being joined, and automatic means for causing the release of the joined stock from the pressers preparatory to its ejection, said pressers being adapted to be disconnected from the releasing means. l

27. The combination with the oppositelymoving carriers, of automatically-releasable Apressers for holding the stock on the carriers While it is being joined, and means for releasing the stock from said pressers at will in case of lodging lumber or clogging of themachine.

28. The combination with the carrier, of a pair of rapidly-rotating cutters for cutting vthe dovetails in a piece of stock moved by the carrier, a supporting-frame for the cutters which is vertically adjustable, and means in therame Jfor adjusting the cutters at right angles to their arbors.

'29. The combination with the carrier, of a air of rapidly-rotating.cutters for cutting the dovetalls in a piece of stock moved by the carrier, a supporting-frame'for the cutters which is vertically adjustable, and a cylindrical housing for the arbor ofeach cutter adapted to be turned on its axis, the arbors being eccentrically located inthe housings.

30. The combination with the carrier, of a pair of rapidly-rotating cutters for cutting the dovetails in apiece of stock moved by the carrier, a supporting-framefm the cutters which is vertically adjustable and a cylindrical housing for-the arbor 'of each cutter, adapted to be turned on its axis, the housings being mounted in said frame and effecting the adjustment'of the arbors at right angles to the axes of the latter by a turning movement of the housings.

31. The combination with the carrier; of a pair' of rapidly-rotating cutters for cutting the dovetails in a piece of stock carried by the carrier, a separatev casing for the arbor of each ssf cutter in which it is eccentrically located,

such casin s being adapted to be turned'independent y to effect adjustment of the arbors relative to the stock, and each arbor be`L ing also inde rectionv of. its ength.

32. In a dOVetaiIingI-machine, a rapidlyvrotating cutter mounted upon an inclined arl endently adjustable in the dibor, .said arbor having its bearings located eccentrically in a cylindrical casing capable 'of a turning adjustment.

33. In a dovetailing-machine, thecombination of companion dovetail-cutters, mount# ed upon oppositely-inclined arbors, and each arbor having its bearings locatedeccentrically in a cylindrical casing capable of a turning adjustment.

34. The combination with the inclined arbor of a ra idly-rotating dovetail-cutter, of a cylindrica casing 174, a support for the casing and in which it has a turning adjustment, and bearings for the arbor located in said casing and eccentrically of its axis.

35. The combination with the oppositelymoving carriers and automatic-ally-releasable pressers, of a spring-actuated ejecting device consisting of an arm lying normally in-the ath of, and positioned for action by the umber.

36. The combination with ,the carriers and the pressers, of a spring-actuated ejecting device consisting of an arm lying normally in the ath of, and positioned for action by the lum er, the device being mounted on a vertical pivot and having a spring for turning the pivot.

37. The c ombinationwith the opositelymoving carriers, of the ejector, an 'means o eration by any stock on one of the carriers w 'ch moves beyond the ejector without beejected.

38. The combination with the oppositelymoving carriers, an ejector, actuating means 'whereby the carriers are driven and embodying a clutch, of a gate over one ofthe carriers adapted to be operated by any stock on that carrier in case it moves beyond'the ejector, and connections between said gate and said clutch serving when the gate is operated to open theclutch.

'l j 39. The combination with thevoppositelymoving carriers, the ejector, and the power mechanism for driving lthe carriers, of a clutch connection between said power mech-v anismand the carriers, and means for o ening the clutch set in operation b stock w ich may pass the ejector without eilig-thrown out thereby.

` ALBERT T. LINDERMAN.

Witnesses:' i. H. M. MUNDAY, EDW. S. E vRTs.

'for stopping the carriers adapted to be set in 

